Pyramid Solitaire is a classic card game available on Android. The objective of the game is to eliminate all the cards in the Pyramid by matching pairs of cards with a combined rank of 13. The game features a pyramid made up of 28 cards in 7 rows, a stockpile, a waste pile, and a foundation.

To play, you can flip cards from the stockpile onto the waste pile and move the top card of the waste pile onto an open pyramid card. You can also move a pyramid card onto another pyramid card, as long as both cards are available. Additionally, you have the option to reset the stockpile when it's empty. The game also allows you to move a King directly to the foundation.

Pyramid Solitaire offers unlimited undos, so you can always backtrack if needed. The game keeps track of your moves and time, allowing you to compete against your best performances. However, not all games are winnable, and the game will notify you if there's no chance of winning.

With its simple and addictive gameplay, Pyramid Solitaire is a great option for fans of card games. Challenge yourself and see how quickly you can clear the pyramid!